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Home >> Infiniti >> 2012 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (EV Control System) >> DTC/Circuit Diagnosis >> Reverse Lamp Relay >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK REVERSE LAMP RELAY CONTROL CIRCUIT
    1. Turn power switch OFF.
    2. Remove reverse lamp relay.
    3. Turn power switch ON.
    4. Check the voltage between reverse lamp relay harness connector terminals.
      VOLTAGE REFERENCE CHART

      Reverse lamp relay Voltage
      Connector + -
      Terminal
      E27 1 2 0 V
    5. Shift the selector lever in P position.
    6. Check the voltage between reverse lamp relay harness connector terminals.
    VOLTAGE REFERENCE CHART

    Reverse lamp relay Voltage
    Connector + -
    Terminal
    E27 1 2 12V battery voltage

    Is the inspection result normal? 

    YES: Go to  9.

    NO: Go to 2.

  2. CHECK IGNITION POWER SUPPLY-I

    Check the voltage between reverse lamp relay harness connector and ground.

    VOLTAGE REFERENCE CHART

    + - Voltage
    Reverse lamp relay
    Connector Terminal
    E27 1 Ground 12V battery voltage

    Is the inspection result normal? 

    YES: Go to  6.

    NO: Go to 3.

  3. CHECK IGNITION POWER SUPPLY-II

    Check the voltage between IPDM E/R harness connector and ground.

    VOLTAGE REFERENCE CHART

    + - Voltage
    IPDM E/R
    Connector Terminal
    E15 58 Ground 12V battery voltage

    Is the inspection result normal? 

    YES: Go to  5.

    NO: Go to 4.

  4. CHECK FUSE
    1. Turn power switch OFF.
    2. Pull out #56 fuse.
    3. Check that the fuse is not fusing.

    Is the inspection result normal? 

    YES: Check power supply circuit for ignition power supply.

    NO: Replace the fuse after repairing the applicable circuit.

  5. CHECK IGNITION POWER SUPPLY CIRCUIT-I
    1. Turn power switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between reverse lamp relay harness connector and IPDM E/R harness connector.
    CONTINUITY REFERENCE CHART

    + - Continuity
    Reverse lamp relay IPDM E/R
    Connector Terminal Connector Terminal
    E27 1 E15 58 Existed

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: Repair or replace error-detected parts.

  6. CHECK REVERSE LAMP RELAY CONTROL SIGNAL CIRCUIT
    1. Turn power switch OFF.
    2. Disconnect VCM harness connector.
    3. Check the continuity between reverse lamp relay harness connector and VCM harness connector.
      CONTINUITY REFERENCE CHART

      + - Continuity
      Reverse lamp relay VCM
      Connector Terminal Connector Terminal
      E27 2 E62 80 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: Go to 7.

    NO: Repair or replace error-detected parts.

  7. CHECK VCM GROUND CIRCUIT

    Check the continuity between VCM harness connector and ground.

    CONTINUITY REFERENCE CHART

    + - Continuity
    VCM
    Connector Terminal
    E61 4 Ground Existed
    8
    E63 111
    112

    Is the inspection result normal? 

    YES: Go to 8.

    NO: Repair or replace error-detected parts.

  8. CHECK INTERMITTENT INCIDENT

    Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: Replace VCM. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair or replace error-detected parts.

  9. CHECK IGNITION POWER SUPPLY-III

    Check the voltage between reverse lamp relay harness connector and ground.

    VOLTAGE REFERENCE CHART

    + - Voltage
    Reverse lamp relay
    Connector Terminal
    E27 3 Ground 12V battery voltage

    Is the inspection result normal? 

    YES: Go to  11.

    NO: Go to 10.

  10. CHECK IGNITION POWER SUPPLY CIRCUIT-II
    1. Turn power switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between reverse lamp relay harness connector and IPDM E/R harness connector.
    CONTINUITY REFERENCE CHART

    + - Continuity
    Reverse lamp relay IPDM E/R
    Connector Terminal Connector Terminal
    E27 3 E15 58 Existed

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: Repair or replace error-detected parts.

  11. CHECK REVERSE LAMP RELAY

    Refer to "COMPONENT INSPECTION (REVERSE LAMP RELAY) ".

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Replace reverse lamp relay.

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